Will electric buses replace propane ones in national parks (which replaced diesels)?

Zion National Park shuttle bus by Flickr user faungg's photos (Used under CC License)

Electric buses could soon enter service shuttling visitors around a U.S. national park. The National Renewable Energy Laboratory (NREL) is evaluating the possibility of converting a fleet of 14 propane-powered buses at Utah’s Zion National Park to electric power. High maintenance costs for the aging bus fleet have led the National Park Service to… …read more